Comparison of microdissection testicular sperm extraction, conventional testicular sperm extraction, and testicular sperm aspiration for nonobstructive azoospermia: a systematic review and meta-analysis.
Bernie AM, Mata DA, Ramasamy R, Schlegel PN.
Fertil Steril. 2015 Nov;104(5):1099-103.e1-3. doi: 10.1016/j.fertnstert.2015.07.1136. Epub 2015 Aug 8.